There are no such things as silly questions! I am still fairly new to charting myself, but from what I understand you don't want to round your temps up- just record them as they are, with both places after the decimal. BBT thermometers purposefully measure your temp that accurately because BBT can vary only a few 10ths of a degree from day to day.
Hope that helps!
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"Let us not become weary in doing good, for at the proper time we will reap a harvest if we do not give up." - Galatians 6:9

TTC on our own for over 2 years
Dx with Severe MFI- Blood work shows no Microdeletion and no CF mutations
Ultrasound scheduled 3/22- DONE! Everything looks normal, other than some cysts on my right ovary.
HSG scheduled 4/14- DONE! Tubes are clear!!

On BCP until our IVF w/ICSI scheduled for August!!!