Probably and probably ;\)

I think the speakers come little stick-on rubber feet - do you have them installed ? If not a trip to the local home building store should offer all kinds of gummy alternatives.

I normally mount bookshelf speakers upside-down on bookshelves, mostly to get the tweeter at listening height, but it means the feet go on top of the speaker. That's another argument for using something other than stick-on feet between speaker and shelf ;\)

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8