Whosoever is born of God DOTH NOT COMMIT sin. Really?

[TonyChanYT]

1 John 1:

8 If we claim to be without sin, we deceive ourselves and the truth is not in us.

But then only 2 chapters later, King James Bible 1 John 3:

9a Whosoever is born of God doth not commit sin

commit
Verb - Present Indicative Active - 3rd Person Singular

Koine-Greek.com:

The imperfective aspect (traditionally, the Present “tense” and the Imperfect “tense”) are used in states of affairs involving customary/habitual action.

Wallace, for example, simply says: “The customary present is used to signal either an action that regularly occurs or an ongoing state. The action is usually iterative, or repeated, but not without interruption. This usage is quite common”

The Greek present tense carries a sense of repetitive or routine action.

My paraphrase: Anyone born of God will not routinely practice sin as a matter of fact.

KJV 1 John 3:

9 Whosoever is born of God doth not commit sin; for his seed remaineth in him: and he cannot sin, because he is born of God.

English Standard Version:

No one born of God makes a practice of sinning, for God’s seed abides in him; and he cannot keep on sinning, because he has been born of God.

Two chapters later, this concept is revisited by John in 1 John 5:

18a We know that everyone who has been born of God does not keep on sinning,

The main verb is:
does not keep on sinning
ἁμαρτάνει (hamartanei)
Verb - Present Indicative Active - 3rd Person Singular
Strong's 264: Perhaps from a and the base of meros; properly, to miss the mark, i.e. to err, especially to sin.

The secondary verb is the participle:
born
γεγεννημένος (gegennēmenos)
Verb - Perfect Participle Middle or Passive - Nominative Masculine Singular
Strong's 1080: From a variation of genos; to procreate; figuratively, to regenerate.

My paraphrase of 18a:

Having been born of God, he does not routinely sin.

Now onto the next clause:

18b but he who has been born of God keeps himself

The main verb for this clause is:
keeps/protects
τηρεῖ (tērei)
Verb - Present Indicative Active - 3rd Person Singular
Strong's 5083: From teros; to guard, i.e. To note; by implication, to detain; by extension, to withhold; by extension, to withhold.

The secondary verb is the participle:
was born
γεννηθεὶς (gennētheis)
Verb - Aorist Participle Passive - Nominative Masculine Singular
Strong's 1080: From a variation of genos; to procreate; figuratively, to regenerate.

My paraphrase of 18b:

Having had been born of God clearly and distinctly, God protects him.

Does "born" have the same meaning on the two occasions it occurs in 1 John 5:18?"

On both occasions, they are the same Greek G1080, sharing the same lexical meaning. They differ in tenses. One is in perfect tense; the other is in the aorist.