There is no numbering as such in Enigma2. The numbers are cumulative over the bouquets unless you have alternate numbering on. In such cases every bouquet starts at 1.
Back to your issue, If your ABM main/first bouquet is the large one " all channels", it will contain all teh chanenls and section markers, The Entertainment bouquet will be "numbererd" after it. Easiest thing is to set Main bouquet to no or HD. Alternatively, you could add a mix file to add the numbers to channel names. If you have more than one provider, ABM will start the bouquets at the next whole thousand
See here too
WooshBuild - channel numbers openatv 6.4 with wooshbuild infinity