yes it can, the block time depends on the difficulty and statistic, pure statistic.
there is no rule that helps you, if one wallet hits 10 blocks in 10 seconds, because of luck.
and i saw many wallets with the same bug, no worries here, if this is your only problem, then i would think,everything is safe.
Agreed. This appears to be a small bug which affects the majority of POS wallets I have used.
Given how new this project is, how common this bug is in other wallets, and how it does not affect actual staking, I am not at all concerned about this at all.
FYI. with 200k coins in my wallet I might get anywhere from 10-20 blocks in 24 hours.