Hi yboivin. There are a lot of variables involved in your question. In most cases, I don't thing that 10 passes on a pasted strop would over-sharpen a razor. Especially at that fine grit.

If you didn't have your razor professionally honed in the first place, I bet it was never actually sharp enough to shave with. Maybe you got lucky, but the consensus on the forum is this: New razors are almost never shave ready.