convert M1 data to all timeframes but something wrong

Hi,
I've done this years ago, now memory's gone.
Today, I just downloaded some data package of XAUUSD 1min, from 2016 till now.
Importing was ok.
Conversion to other timeframes with "period converter auto" was successful.
I could see in "open offline data" that XAUUSD 5min data is from 2016.01.03 till now. But openning it to the chart, I found data is actually from mid 2019 till now, which is the same as that in F2 history data center.
What's wrong? Could anybody please help?

It may concern number of bars shown on the chart
Take a look at :
Tools>Options>Charts>Max bars in chart

Thanks for your help!
It's not the case, and my M1 chart can show all bars from 2016.

Just now I deleted all XAUUSD .hst files except 1m file, converted again, and everything is fine now. Looks like chaos with data remain.
Thanks again.