Continue seqlist numbering

I have two seqlist lists in a row in my xml like:
 
<seqlist>
<item>this is item 1</item>
<item>this is item 2</item>
<item>this is item 3</item>
</seqlist>
<seqlist>
<item>this is item 1</item>
<item>this is item 2</item>
<item>this is item 3</item>
</seqlist>
 
I can get it to number them but I need the second list to be numbered
starting with the last item from the first list.
I've tried <xsl:number count="item" level="multiple" format="1.1.1"/>
for the second list but I'm still getting 1.2.3.
 
The outcome should look like.
 
1. this is item 1
2. this is item 2
3. this is item 3
 
    3.1. this is item 1
    3.2. this is item 2
    3.3. this is item 3
 
Any help is appreciated.
Thanks


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