Halo Waypoint Playtime Stats Inaccuracies

My Playtime stats for MCC are completely off: 98 days.
A few months ago it 94 days. I’ve only played MCC sparingly between now and then
This is grossly inaccurate and annoying. My real time (in game) is around 16 -18 days.
I’ve asked this question many times: is this a bug?
And if it is, can it be fixed? If not, can my stats be reset?

Note: I’m not installing or playing MCC again until this issue is fixed. I’ve asked for this multiple times and I’ve still gotten no response, so I’ve decided not to play agIn until this issues is resolved for me.

Also, it’s not just the playtime stats. The k/d ratio is off as well.